#1
what are they? i know theres this form

ex
bx
gx
d4
a4
e2

what else?
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#2
In general there are three shapes for power chords, depending on what string your
root is on. that shape works if the root is on the E or A string. but if you wanted an E
power chord starting on the 2nd fret of the D string (which is also E), you would have to
use a different shape:

ex
b5
g4
d2
ax
ex

which is obvious because the 5th fret of the B string is an E...if you used the 4th fret
it would sound wrong. if you wanted to make a power chord even higher than that,
there is another shape for starting on the g string, which is pretty easy to figure out.
And also you don't always have to include the octave, just the tonic and fifth works.
#3
A power chord is just a root and a fifth. Play a root and a fifth anywhere and you have a power chord.
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#4
there's

e 5
b 5
g 2
d
a
e
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#5
would the opening smoke on the water riff be inverted powerchords, bacause the bass note is the 5th?
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#7
Basically:

E|------------------4---
B|-------------4---4---
G|--------3---3---1----
D|---3---3---1--------
A|---3---1-------------
E|---1-----------------

Move them up the neck as you please.
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#8
you can also use 4ths if the bassline is playing the root, for example



guitar
D-2---
A-2---
E----

bass
D---
A---
E--0

#9
Okay...all different shapes that can be classified as powerchords: (for an...say G-powerchord)
(oh, i'm writing from left to right for the sake of not making the post too long, low E-string = left, high E = right)

"standard shape #1" (3 5 x x x x)
"standard shape #2 (added octave)": (3 5 5 x x x)
"inverted shape (5th in bass)": (x 5 5 x x x)
"inverted with doubled 5th": (x 5 5 7 x x x)
"double octave shape": (x 5 5 7 8 x)

Of course, you can play all these chords in different octaves. (in case you can't figure the positions out, learn some basic music theory like where are the notes on the fretboard)

And yes to the guy before, in the original, SoTW is being played with the inverted shape...
#10
E|---3--------
B|---3--------
G|------------
D|------------
A|------------
E|---3-------

You would never use it but thats just an oddball form for you. Theres all sorts of ways especially when you start doing inversions as LiquidSkies pointed out.
#11
Quote by permanentmarker
would the opening smoke on the water riff be inverted powerchords, bacause the bass note is the 5th?

You could call it that. I personally like to call them 4ths though instead.

This is just me, but if you add the octave above it, to me it always feels like an inverted power chord, the way it resolves...
#12
^actually they would technically be fourths but i would look at them as fifths since the root is played on the bass.
#13
The Angus Young G powerchord.

E|---3--------
B|---3--------
G|---0--------
D|---0--------
A|---x--------
E|---3--------

take_it_t wasn't so far away from something commonly used.